Keyboard telegraphic transmitter.



P. B. 'DELANY.

I KEYBOARD TELBGRAPHIO TRANSMITTER.

APPLICATION FILED MAY 26, 1905.

91 1,384, Patented Feb. 2. 1909.

llllllll HWIIIIIIIIIIIIIII m-u-mm PATEIcKB. DELANY, oEso TnoEANeE, NEW JERSEY.

KEYBOARD TELEGRAi?HIC TRANSMITTER.

Specification oil-Letters Patent.

Patented Feb. 2, 1909.

Application filed May 26, 1905 Serial No. 262,410.

To all whom it may concern: 7 I Be it known that I, PATRICK B. D LANY, a citizen of the United States, residing at South Orange, in the county ofEsseX and State of.

New Jersey, have invented certain newand useful Improvements in Keyboard Telegraphic Transmitters, of which the following'is aspecification.

This invention relates to keyboard transmitters of the general character disclosed in my application for Letters Patent, No. 164,999, filed July 10, 1903. 7

The primary object of the invention is to avoid theuse of gearing or rack-and-gear driving connections by which the contact maker is caused to travel over its table or series of contacts when its key is operated, there being certain objections, unnecessary to state here, incident to the use of such geared driving actuating devices. To this end, I provide a friction drive accomplishedby means of two revolving wheels, rollers v or disks whose axes are out of line and between which is disposed the traveling bar carrying the contact maker. Engagement of the bar with the cylinder orwheel is obtainedby tilting the bar so that it is cramped between the surfaces of the cylinders, bearing" against the under face of one and the top face of the other,

this condition being maintained during the traverse of the oar by an appropriate spring, or springs, or otherwise. c

The invention includes other features hereinafter set forth. 7

It has been deemed unnecessary to show more than a single contact maker, its trav-f eling bar and corresponding key, as allothers would be duplicates thereof; and the construction and mode of operation of such apparatus is well understood;

Inthe accompanying drawings: Figure 1, is a somewhat diagrammatic view illustrating'the construction of the key board transmitter: Fig. 2, shows a modification of the electrical apparatus, connected therewith:

Fig. 3, shows transmission to a distance and reception by a polarized relay: Fig; 4, is a de tail elevation showing the friction driven cylinders and two traveling contact bars in section. Fig. 5, a detail view showing a section of perforated transmitting tape thatmaybe prepared by suitable punches controlled by the key board transmitter. V

a, b, show two horizontally disposed cylinders, to be appropriatelymounted in suitable bearings, arranged one above the other with their axes in difierent vertical lanes. As shown, they maybe geared toget er and one of them provided; with a. pinion b driven in any. suitable way,as by a worm b on the shaft of an electric motor 6 'c is aseries or table of electric contacts hereinafter described fmore in detail; (1 a contact maker that traverses them; and f i the traveling bar carrying the contact maker, and which'isnormally drawn to its rearmost inactive. position by a spiral spring f. This bar is guided in posts g, g and in a loop or eye it carried by the key lever t. It asses between the friction driving cylin ers .whose peripheries are in different planes, there being suflicient space between the lanes *in which the lower surface of the oy -nder a and the upper surface of the cylinder 1) revolve for the accommodation, without contact with either cylinder, of 'th'e bar f which'normally by reason of its support in the post 9 and part it of the key, is held "out of contact with either cylinder. If,-now, the front, end of the bar should be depressed, it would be tilted or cramped between the two cylinders making contact with the lower surface of one and the up er surface of the other and be frictiona ly driven forward or in the direction of the arrow; I

j is the upper limiting stop of the key and it a spring that normally holds it against such stop, the key being'shown as pivoted in the upper end of post g.

Since there is sufficient play of the bar f in the part? to permit free traverse of the bar, a s ring m is attached to the under side of the :ey in front of its pivot and bears when the key is, depressed, upon the front end of the bar f thereby tilting it in contact with or cram ing it between the surfaces of the driving r0 ls. When the key is depressed it is held down by a spring latch n, the latch or movable member 0 of which may be common to all the keys and which being struck by the front end of the bar f when it has completed its traverse, releases the key and permits it to return to normal position. W hen the key so returns, the tension of spring f '7 is such that the speed of the return traverse of the contact maker (1 over the .table of contacts is such that instruments connected in circuit will not be affected.

To insure proper contact of the bar with the surfaces of the driving cylinders, I provide a second spring m; in advance of that m,

which is engaged by the front end of the traveling bar when the latter has completed part of its forward excursion. lhe traveling bars f may be of any appropriate cross section, being; shown as of triangular cross section in Fig. i and, correspondin y, in such case, the roll 5 is preferably provided with triangular grooves f into which the bars seat. The surfaces of the cylinders may, however, be of any appropriate formation in order to accomplish the intended operation.

To prevent the depression of one key lever until a previously depressed one has been restored to normal position, on the front end of each key lever, separ parallel projections p, p; and, in f ont of the series of key lev rs on a rock shalt g is mounted an ar gular plate having a long; horizontal portion 9 that extends under the lower projections p on the keys and. a shorter upper horizontal projection if that extends toward, but does not contact, with the upper projections 29 on the keys. One or more springs 1* applied to the under surface of g 'iolds the la ter up in normal position in engagement with the under surfaces of the projections p of the various lie "i l hen any key is depressed, the plate rocked downward thereby carrying plate under the projections of all the und keys to lock them inst depression.

This apparatus has beei practically constructed and experi nce has shown highly efiicient. 'lne principles invol. I may, no doubt, be embodied in vari us other forms by those skilled in the art c-ithor departing materially from this invention.

As shown in 1, one pole of a battery or generator MB is connected with the f nine of the instrument and consequently with the various trailers (Z, and the other pole is connected with the contacts in the several bles or series of contacts such as c. in t. instance, as well as in Figs. 2 a: d 3, the contacts are arranged for the transmission of the letter J of the Morse code. The active or battery connected contacts required for the formation of the letter J are numbered from 1 to 8 inclusive and are of uniform size but of dissimilar spacing to produce dots and dashes. In Fig. 1, contacts numbered 1, 3, 5 and 7 areconnectcd with the battery MB through a punch magnet M, while numbers 2, 4:, 6 and 8 are connected through punch magnet M. normally retracted armature levers of these magnets wnen attracted deliv r a blow upon the punches m, m to perforate a continuous tape traversing through the punch block N. A section of ribbon or tape punched for the letter J is shown in 5 and may be used for transmission in machine telegraphy having a chemical recorder. Such an arrangement of perforations and the method of sigl5, 1903 the traveling bar is brought into driviup engagement with the cylinders (1, I), the trailer is moved forward at such speed that contact wit the several live contact pieces 1 to H is of such duration as to be effective in operating the magnets \i M. hen the trailer is upon contact 1, punch magnet M is operated and PGTfOl'lltlOll 1 is formed in the tape (Fir. 5). During the long: interval representing a dash in which the trailer is passing to contact No. 2, the tape traveling at uniform speed through the punch block and when the trailer comes upon No. 2 punch magnet M is operated and perfm'ation 2 is formed in the tape. Vi hen the trailer is upon i o. 3, mag net M is again operated to form the perforation 3 and during the shorter interval between 3 and 4.- wliich is required for formation of a dot signal, the tape is traveling, and ien (Z (,OlllQn-l upon contact 1, punch magnet in is actuated and perforation 4. formed in the tape, and so on, the characters formed being dash, dot, (lash, dot. ln the Sjy'rllOlll of automatic machine telcgrruphy referred to, the dash si nal is initiated by perforatimi l in one row and terminated by 2 in the other row, the interval between the two being' of such length as to result in the production at 0 receiver of a dash. The interval beeon 3 and 4 being v much less, a dot produced at the receiver. .lin Fig. 3, the same arrangement of contacts is shoun. rue generator MB is grounded in the middlo. One pole is connected to the contacts 1, 3, and 7' and t 0 other pole to contacts 2, l, 6 and S. The trailer (Z is connected to line which may be of any fem-able length, and the transn'iitted si nals are received upon a polarized relay receiver as dots and dashes munifestcd by any suitable instrument locally controlled by the relay.

in Fig. 2, the punch imicncts M, M are connected, as before, to a norator MB, but the brancl'i. circuits therefrom, including; the punch magnets, aie controlled at the front stops of relays t), 6'' connected in circuit with a local battery Z 7) that is connected with the contacts 1 to S inclusive.

In the arrangement shown in igs. l and 3, the tape punching imiy be entirely loc: l and tor the purpose merely oi. preparing the tape for automatic or machine tramunission of the message; or, the punching devices may be located at an indefinite distance from trio key board transmitter and in tin .t event, the punch magnets or other devices for recording the message upon the tape may constitute receivers of the transmitted message that may be read from the perforations in the tape, and by means of it, relayed or retransmitted into another circuit.

The spring (1 is so constructed and arranged t at proper contact is made between it and the series of contacts'when the rear end of the bar is thrown upward by depression of the key. There is, therefore, no necessity for invertingthe series of contacts and spring trailer so that the latter will traverse in contact with their under faces.

I claim as my invention:

1. In a key-board transmitter, the combination of a series of message transmitting contacts, a contact member adapted, to traverse them, an endwise traveling bar carrying the contact maker, friction driving wheels or cylinders arranged with their axes in different lines transverse to the bar, and between the adjacent surfaces of which the bar normally lies, a finger-piece or key-lever operatively connected with the bar to tilt it when the finger piece is depressed to thereby throw it into frictional engagements with the upper surface of one cylinder and the lower surface of the other whereby the bar is frictionally driven forward to carry the contact maker over the series of contacts, and means for returning the bar to normal position. i i

2. In a key-board transmitter, the combination of a series of message transmittingv contacts, a contact member adapted to traverse them, an endwise traveling bar carrying the contact maker, friction driving wheels or cylinders arranged with their axes in different lines transverse to the bar and between the adjacent surfaces ofwhich the bar normally lies, a finger-piece or key-lever, a loose connection between it and the bar, a

spring interposed between the bar and keylever whereby on depression of the key-lever the front end of the bar is depressed so that the bar is brought into contact with adjacent surfaces of the driving cylinders and is driven forward to carry the contact maker over the series of contacts and a spring for automatically returning the bar to normal position.

3. In a key-board transmitter, the combination of a series of message transmitting contacts, a contact member adapted to traverse them, an endwise traveling bar carrying the contact maker, friction driving wheels or cylinders arranged with their axes in different lines transverse to the bar and between the adjacent surfaces of which the bar normally lies, a finger-piece or key-lever operatively connected with the bar to tilt it when the finger piece is depressed to thereby throw it into frictional engagement with the upper surface of one cylinder and the lower surface of the other whereby the bar is frictionally driven forward to carry the contact maker over the series of contacts, means for locking thekey in depressed position, means for automatically releasing the key when the bar has completed its forward traverse and means for returning the bar to normal position.

' 4. In a key-board transmitter, the combination of a series of message transmitting contacts, a contact member adapted to traverse them, an endwise traveling bar carrying the'contact maker, friction driving wheels or cylinders arranged with their axes in different lines transverse to the bar and between the adjacent surfaces of which the bar normally lies, a finger-piece or key-lever operatively connected with the bar to tilt it when the finger piece is depressed to thereby throw it into frictional engagements with the upper surface of one cylinder and the lower surface of the other, whereby the bar is frictionally driven forward to carry the contact maker over the series of contacts, means for locking the key in depressed position, means for automatically releasing the key when the bar has completed its forward traverse, means for returning the bar to normal position and means adapted to lock the other key levers of the instrument against depression until a depressed key has been released.

5. In a key-board transmitter, the combination of a key-lever having projections 19, p, and a rocking locking device comprising the parts g, g cooperating for the purpose set forth.

6. A key-board transmitter, comprising the combination with a movable contact maker, an endwise traveling bar on which it is mounted and revolving friction driving members located on opposite sides of the bar and adapted to frictionally actuate it in one direction.

7. In a key-board transmitter, the combination with a movable signal contact effecting member, of rotating friction drivers arranged on opposite sides of such member, with their axes in different transverse lines, andoperating as described.

8. In a keyboard transmitter the combi nation with a movable contact maker thrown into oneration by depression of its key, a series 0 contacts, two for each dot and two for each dash, over which the contact maker traverses, the contacts for dots being separated by uniform space and the contacts for dashes being separated by space corresponding to the length of the dash, each dot and dash contact being connected to a source of current of opposite polarity to the contact in front or behind it.

In testimony whereof, I have hereunto subscribed my name.

PATRICK B. DELANY.

Witnesses:

L. F. BROWNING, EDWARD O. DAVIDSON. 

